US2931716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for handling liquid materials and for granulating and conditioning solids
Assignee: Zonolite Co
•
Filing: 1954-11-16
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Granted: 1960-04-05
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Expires: 1974-11-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Kelley
- 👤 John L Ridgeway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:46
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/28; Y; Y10; Y10S; Y10S71/00; Y10S71/02; Y10S71/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD WHICH COMPRISES REACTING AND AQUEOUS SOLUTION OF THE TETRA SODIUM SALT OF ETHYLENE DIAMINE TETRA ACETIC ACID WITH AN IRON SULFATE IN THE PRESENCE OF SULFURIC ACID, MIXING THE RESULTING MATERIAL WITH EXFOLIATED VERMICULITE, PERMITTING THE RESULTING MATERIAL TO CURE WHEREBY SODIUM SULFATE FORMED DURING THE SAID REACTION REMOVES FREE WATER FROM THE MIX, AND HEATING THE RESULTING GRANULAR MATERIAL AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO REMOVE SUBSTANTIALLY ALL OF THE FREE WATER.
Claim 2
Independent Claim
78 words
THE METHOD WHICH COMPRISES REACTING AND AQUEOUS SOLUTION OF THE TETRA SODIUM SALT OF ETHYLENE DIAMINE TETRA ACETIC ACID WITH AN IRON SULFATE IN THE PRESENCE OF SULFURIC ACID, MIXING THE RESULTING MATERIAL WITH EXFOLIATED VERMICULITE, PERMITTING THE RESULTING MATERIAL TO CURE WHEREBY SODIUM SULFATE FORMED DURING THE SAID REACTION REMOVES FREE WATER FROM THE MIX, AND HEATING THE RESULTING GRANULAR MATERIAL AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO REMOVE SUBSTANTIALLY ALL OF THE FREE WATER.
References Cited (Backward Citations)
USRE21638E
Cited
US847749A
Cited
US2192939A
Cited
US2240859A
Cited
US2341800A
Cited
US2669510A
Cited
US2791496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |